As I've worked on a replica of the Millennium Falcon's cockpit over the years, there has been a mystery spot that has always eluded me. But I may have solved the mystery.
The problem area is a box of levers hanging from the canopy, directly over the dashboard console. In A New Hope, Han Solo reaches up to pull one of these levers after they run into the lone TIE fighter in the destroyed Alderaan System. This area is in perpetual shadow, and I've never really know what kind of levers were up there. You can only really see them in silhouette:
Some months ago, on a routine scouring of screencaps from ANH, I came accross the lever that Ben Kenobi uses to deactivate the tractor beam on the Death Star.
The lever itself uses another part that shows up in a number of places. The long piston-like part was used both as an acuator on C3PO's legs, and as the hyperspace throttles on the Millennium Falcon's cockpit.
Once built, I added them to the cockpit, and after some careful adjustment, they seem to fit very well.
This is a render in silhouette
And here's that bluescreen shot again:
not a bad match at all.
and now, here are some renders of the full cockpit.